the wall i jumped off was probably like 4 feet and i messed up a lot and it landed like sideways and bent in half, idk its hard to explain, but ill try and take a picture
no that rim wont work at all...its a 20" rim you need a 19 for a trials tire like the one that comes on the dx...i recomend an alex dx 32, a try-all trials rim, or a kh trials rim.